Plastic article or earthenware shaping or treating: apparatus – Female mold and means to shape parison directly by internal... – Including means to prepare parison
Patent
1983-03-08
1984-11-27
Silbaugh, Jan
Plastic article or earthenware shaping or treating: apparatus
Female mold and means to shape parison directly by internal...
Including means to prepare parison
264532, 264542, 425532, 425538, B29C 1707
Patent
active
044848820
ABSTRACT:
A blow molding machine for forming a chain of hollow, shaped article bodies of a normally highly crystalline thermoplastic material which is biaxially oriented, from a continuous tube of the material in substantially unoriented condition, but at its orientation temperature, which includes a tube and chain transporter for pulling the tube from a first point to a second point, and for pushing beyond the second point that portion of the chain formed between the two points; a tube brake to brake the travel of the tube past the first point during at least part of the time it is being pulled, whereby the part of the tube between the points becomes longitudinally stretched; and stationary blow molding means including a plurality of stationary blow molds between the first point and the second point, each having corresponding mold pieces closable on the stretched part of the tube, and openable after formation of the hollow body in the cavity defined by the closed mold pieces, and means for inflating the portion of the stretched part of the tube within the mold cavity, whereby one of the bodies is formed therein, and the material thereof becomes biaxially oriented, and chain carrier means for supporting that portion of the chain formed between the two points until it has been pushed beyond the second point.
REFERENCES:
patent: 2790994 (1957-05-01), Cardot et al.
patent: 3541189 (1970-11-01), Yoshikawa et al.
patent: 3844700 (1974-10-01), Sokolow
Alexander William S.
Hercules Incorporated
Silbaugh Jan
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